| australia | new south wales | neptuniibacter sp. au49 | species | 1 | 0 |
| australia | queensland | uncultured neptuniibacter sp. | species | 43 | 0 |
| china | hunan | uncultured neptuniibacter sp. | species | 1 | 0 |
| japan | okayama prefecture | neptuniibacter sp. ts-2016 | species | 1 | 0 |
| mexico | yucatan | uncultured neptuniibacter sp. | species | 1 | 0 |
| norway | | neptuniibacter sp. atr 1.1 | species | 236 | 0 |
| norway | | neptuniibacter sp. lft 1.8 | species | 408 | 0 |
| taiwan | | neptuniibacter | genus | 0 | 1 |
| taiwan | | neptuniibacter caesariensis | species | 0 | 2 |
| united states | | neptuniibacter caesariensis | species | 1 | 0 |
| united states | california | neptuniibacter caesariensis | species | 45 | 0 |
| united states | florida | uncultured neptuniibacter sp. | species | 3 | 0 |
| united states | south carolina | uncultured neptuniibacter sp. | species | 1 | 0 |
| united states | wisconsin | neptuniibacter sp. phe_28 | species | 266 | 0 |